Land Rover bulletin Discovery_N846_16MAY25
What it saysBelt Integrated Starter Generator (BISG) Charging Inoperative on First Startup NHTSA’s full summary ↓
Land Rover filed this with NHTSA as a manufacturer communication dated May 16, 2025, received Jun 5, 2025, about the electrical system. It names 2 model years (2023–2024). A manufacturer communication is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationBelt Integrated Starter Generator (BISG) Charging Inoperative on First Startup
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Discovery_N846_16MAY25 | Other | May 16, 2025 | 11019210 | PDF, 203 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 2 model years this bulletin names have filed 19 complaints with NHTSA since 2015. 10 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
Red warning in dash along with “stop safely, electrical fault detected.” Car drove normally for a mile before wipers came on and then multiple warnings for “collision, suspension, stability, height, tire, braking fault, ect. detected” came on. Car lost all power, steering wheel locked, unable to park or turn off vehicle with push button.
2024 Land Rover Discovery · Electrical System · filed with NHTSA Oct 13, 2026 · ODI 11770976
While stopped in traffic with the vehicle’s automatic engine start-stop feature engaged, the vehicle failed to respond when the accelerator was pressed. The engine had shut off normally due to the start-stop system, but when attempting to move again, the vehicle did not accelerate and appeared temporarily disabled.
2023 Land Rover Discovery · Electrical System · filed with NHTSA Feb 6, 2026 · ODI 11716334
I purchased my 2024 Land Rover Discovery new in March of 2024. In October of 2025, I found a large amount of water leaking through my windshield. Land Rover had my vehicle from October 2025 until April 2026. When it was returned to me it had mold in that had to be remidate3d and now my screen is starting to short.
2024 Land Rover Discovery · Electrical System · filed with NHTSA Apr 26, 2026 · ODI 11733856
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the electrical system
Source: same model, same component group63 other manufacturer communications filed against the Land Rover Discovery under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Land Rover list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N811 Discovery 15MAY26 | Other | May 16, 2026 | Door Zone Module - Quiescent Drain |
| N811 Discovery 17APR26 | Other | Apr 17, 2026 | Door Zone Module - Quiescent Drain |
| N869 DISCOVERY 20MAR26 | Other | Mar 20, 2026 | Software Over The Air (SOTA) updates are failing to complete. |
| SSM76411 - 10MAR26 | Other | Mar 10, 2026 | Smart Key Deactivated message on instrument cluster and unable to start their vehicle |
| Discovery_N861 02-20-2026 | Other | Feb 20, 2026 | The 48V Mild Hybrid Electric Vehicle (MHEV) battery enters an offline state and no longer communicates or functions as intended. This can re… |
| Discovery_N811 02-20-2026 | Other | Feb 20, 2026 | Door Zone Module - Quiescent Drain |
| TUCC_FEB2026_35 | Other | Feb 13, 2026 | There is a concern with the 48Volt charging system(DC/DC) with the vehicle. |
| TUCC_FEB2026_34 | Other | Feb 13, 2026 | There is a concern/fault with the 48Volt MHEV system. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Land Rover, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Land Rover Discovery_N846_16MAY25 a recall?
No. A manufacturer communication is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the Discovery_N846_16MAY25 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does Discovery_N846_16MAY25 cover?
The manufacturer filed it against 2 model years: 2024 Land Rover Discovery, 2023 Land Rover Discovery. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.